Automatic liquid sample reserving device

Abstract

The utility model relates to the technical field of water sample collection, in particular to an automatic liquid sample reserving device which comprises a sample reserving container, the sample reserving container is connected to a sampled pipeline so as to be used for collecting liquid in the sampled pipeline, a valve mechanism is arranged in the sample reserving container, the valve mechanism comprises a floating ball assembly and a plug assembly, and the floating ball assembly is connected with the plug assembly. The plug assembly is arranged on the fixing rod and is in damping connection with the fixing rod, and the valve mechanism is configured to enable the plug assembly to open a discharge port of the reserved sample container under the combined action of the floating ball assembly and liquid in the reserved sample container. The valve mechanism is further configured to close the discharge port of the reserved sample container under the damping effect after the liquid level in the reserved sample container drops. The sample reserving device can automatically and periodically reserve samples, sampling personnel can sample at any time, if sampling is not carried out for a long time, liquid for reserving the samples can be automatically discharged for reserving the samples next time, and the timeliness of the reserved samples is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of water sample collection, in particular to an automatic liquid sample retaining device. Background Art

[0002] With the rapid development of my country's social economy and the acceleration of industrialization, the number of various production enterprises is increasing, and the working conditions are different. It is common for enterprises to discharge secretly or mix discharges, which has a major impact on subsequent factory areas or ditches where discharge is directly caused, and at the same time causes a lot of enforcement costs for environmental law enforcement departments.

[0003] There are many online sample retention and detection devices on the market, but most of them are expensive and cannot be put into large-scale market application. For example, the intelligent automatic water quality sample retention device disclosed in Chinese patent document CN215677710U has a complex structure. Although there are strict control mechanisms for sample retention and emptying, it also makes the sample retention device expensive and inconvenient to maintain. The automatic sample retention device requires regular sampling around the clock, and the samplers collect and analyze the samples irregularly. If the sample retention device fails, it is difficult for the samplers to find it in time, resulting in inaccurate sample retention. Summary of the invention

[0004] The utility model aims to provide an automatic liquid sample retaining device to solve the problems of complex structure and inconvenient maintenance of the existing sample retaining devices.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a liquid automatic sample retention device, including a sample retention container, the sample retention container is connected to a sampled pipeline for collecting liquid in the sampled pipeline, a valve mechanism is provided in the sample retention container, the valve mechanism includes a float assembly and a plug assembly, the plug assembly is arranged on a fixed rod and forms a damping connection with the fixed rod, the valve mechanism is configured to enable the plug assembly to open the discharge port of the sample retention container under the joint action of the float assembly and the liquid in the sample retention container, and the valve mechanism is also configured to close the discharge port of the sample retention container under the action of damping after the liquid level in the sample retention container drops.

[0006] In one embodiment, the float assembly includes a float and a float rotating rod, the float is provided at one end of the float rotating rod, the middle part of the float rotating rod is rotatably connected to the first fulcrum, and the other end of the float rotating rod is connected to the plug assembly, the plug assembly includes a plug rotating rod, a plug connecting rod and a plug, the middle part of the plug rotating rod is rotatably connected to the second fulcrum, one end of the plug rotating rod is connected to the float rotating rod, and the other end of the plug rotating rod is connected to the plug through the plug connecting rod.

[0007] In one embodiment, the first fulcrum is arranged at a position lower than the second fulcrum, and the end of the plug rotating rod and the end of the float rotating rod are connected by means of an elastic connecting member.

[0008] In one embodiment, the lower end of the fixing rod is fixedly connected to the bottom of the sample container, and the fixing rod is provided with a connecting pipe portion located on one side thereof in a radial direction, the plugging connecting rod is sleeved in the connecting pipe portion, and the outer wall of the plugging connecting rod forms a damping connection with the inner wall of the connecting pipe portion.

[0009] In one embodiment, the discharge port of the sample retention container is connected to a discharge pipe, and the liquid in the sample retention container is discharged to the outside through the discharge pipe, and the discharge pipe is provided with a check valve.

[0010] In one embodiment, a water drawer is further included, and the water drawer is used for a sampling person to draw liquid from the sample container.

[0011] In one embodiment, the sampled pipeline is further provided with a flow regulating valve for regulating the liquid inlet flow of the sample retention container.

[0012] In one embodiment, the sampled pipeline is a factory sewage pipe, and the liquid is factory wastewater.

[0013] The beneficial effects of the utility model are:

[0014] When the liquid level in the sample container reaches a preset maximum level, the float can drive the plug to move and open the discharge port of the sample container, thereby discharging the liquid in the sample container. Under the effect of damping, the plug gradually drops until the discharge port is closed during the process of the liquid in the sample container being discharged from the discharge port, thereby reserving enough time for the sample container to fully discharge the liquid to the preset minimum level. The sample retention device configured in this way can automatically perform periodic sampling, and the sampling personnel can take samples at any time. If no sampling is taken for a long time, the sampled liquid will be automatically discharged in preparation for the next sampling, thereby ensuring the timeliness of the retained samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the closed state of the discharge outlet of the sample retention container in an embodiment of the utility model.

[0016] Figure 2 It is a structural diagram of the discharge outlet of the sample retention container in an embodiment of the utility model in an open state.

[0017] Figure 3 It is a structural diagram of a water pump according to an embodiment of the utility model.

[0018] Figure 4 It is a structural diagram of a flow control valve according to an embodiment of the utility model.

[0019] Figure 5 It is a schematic diagram of a usage scenario of an embodiment of the utility model.

[0020] Wherein: 1 sample container, 11 discharge port, 2 valve mechanism, 21 float assembly, 211 float, 212 float rotating rod, 213 first fulcrum, 22 plug assembly, 221 plug rotating rod, 222 plug connecting rod, 223 plug, 224 second fulcrum, 23 elastic connecting piece, 3 fixing rod, 31 connecting pipe part, 4 liquid discharge pipe, 5 check valve, 6 water pump, 7 flow regulating valve, 8 sample cover, G sampled pipeline. DETAILED DESCRIPTION

[0021] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] See also Figures 1 to 5 As shown, the utility model discloses an automatic liquid sample retaining device, including a sample retaining container 1, which is connected to a sampled pipe G for collecting liquid in the sampled pipe G. A valve mechanism 2 is provided in the sample retaining container 1, and the valve mechanism 2 includes a float assembly 21 and a plug assembly 22. The plug assembly 22 is arranged on a fixed rod 3 and forms a damping connection with the fixed rod 3. The valve mechanism 2 is configured to enable the plug assembly 22 to open a discharge port 11 of the sample retaining container 1 under the joint action of the float assembly 21 and the liquid in the sample retaining container 1. The valve mechanism 2 is also configured to close the discharge port 11 of the sample retaining container 1 under the action of damping after the liquid level in the sample retaining container 1 drops.

[0023] When the liquid level in the sample container 1 reaches the preset maximum liquid level, the float assembly 21 can drive the plug assembly 22 to move and open the discharge port 11 of the sample container 1, thereby discharging the liquid in the sample container 1. Under the damping effect, during the process of the liquid in the sample container 1 being discharged from the discharge port 11, the plug assembly 22 gradually descends until the discharge port 11 is closed, thereby reserving enough time for the sample container 1 to fully discharge the liquid to the preset minimum liquid level. The sample retention device configured in this way can automatically perform periodic sampling, and the sampling personnel can take samples at any time. If no sampling is taken for a long time, the sampled liquid will also be automatically discharged in preparation for the next sampling, thereby ensuring the timeliness of the retained samples.

[0024] See also Figure 1 to Figure 2As shown, the float assembly 21 includes a float 211 and a float rotating rod 212, one end of the float rotating rod 212 is provided with a float 211, the middle part of the float rotating rod 212 is rotatably connected to the first fulcrum 213, the other end of the float rotating rod 212 is connected to the plug rotating rod 221 of the plug assembly 22, the plug assembly 22 includes the plug rotating rod 221, the plug connecting rod 222 and the plug 223, the middle part of the plug rotating rod 221 is rotatably connected to the second fulcrum 224, one end of the plug rotating rod 221 is connected to the float rotating rod 212, and the other end of the plug rotating rod 221 is connected to the plug 223 through the plug connecting rod 222. The first fulcrum 213 is set at a position lower than the second fulcrum 224, and the end of the plug rotating rod 221 and the end of the float rotating rod 212 are connected by the elastic connecting member 23.

[0025] The first fulcrum 213 and the second fulcrum 224 are fixedly arranged in the sample container 1. The first fulcrum 213 and the second fulcrum 224 can be formed by a connecting rod fixedly connected to the side wall of the sample container 1 and extending toward the middle of the sample container 1, or by a vertical rod vertically fixed to the bottom of the sample container 1 and extending upward. The first fulcrum 213 is arranged at a position lower than and close to the preset maximum liquid level of the sample container 1, so that the float 211 gradually floats up when the liquid level in the sample container 1 gradually rises to close to the maximum liquid level, until the liquid level of the sample container 1 reaches the preset maximum liquid level, the float 211 rises to drive the plug to open the discharge port 11.

[0026] Since the end of the plug rotating rod 221 and the end of the float rotating rod 212 are connected by an elastic connector 23, which is more specifically a spring or elastic rope, the plug 223 will not move before the float 211 starts to float up, but the elastic connector 23 will deform and accumulate elastic force. At this time, the plug will remain in a closed state of the discharge port 11 under the action of the liquid pressure in the sample container 1. As the liquid level and the float 211 continue to rise, the elastic force of the elastic connector 23 continues to increase, and the elastic force pulls one end of the plug rotating rod 221 downward and the other end moves upward, eventually overcoming the pressure exerted by the liquid on the plug 223, so that the plug 223 moves upward to open the discharge port. When the discharge port 11 is opened, the liquid pressure on the upper and lower sides of the plug 223 offsets each other, and the elastic connector 23 automatically shrinks, and the distance between the plug 223 and the discharge port 11 can be maintained at a certain size, which is conducive to fully opening the discharge port 11.

[0027] In other embodiments, it is also feasible to set the first fulcrum 213 at a position higher than the second fulcrum 224. In this case, the end of the plug rotating rod 221 and the end of the float rotating rod 212 are connected by a hard connecting member, such as a push rod. The float rotating rod 212 pushes the plug rotating rod 221 to rotate through the push rod, which can also open the discharge port 11.

[0028] The lower end of the fixing rod 3 is fixedly connected to the bottom of the sample container 1. The fixing rod 3 is provided with a connecting pipe portion 31 located on one side thereof in the radial direction. The plugging connecting rod 222 is sleeved in the connecting pipe portion 31, and the outer wall of the plugging connecting rod 222 forms a damping connection with the inner wall of the connecting pipe portion 31.

[0029] When the liquid level in the sample container 1 gradually decreases with the discharge, the float 211 also gradually decreases, and the plug connecting rod 222 and the plug 223 also decrease as a result. Since there is damping between the outer wall of the plug connecting rod 222 and the inner wall of the connecting pipe part 31, the plug connecting rod 222 and the plug 223 descend slowly, thereby reserving time for the liquid to be fully discharged, until the liquid is completely discharged, and the plug 223 closes the discharge port 11 again. The damping size between the outer wall of the plug connecting rod 222 and the inner wall of the connecting pipe part 31 is determined according to the liquid discharge time of the container 1, and those skilled in the art can adjust the damping size according to actual needs. The damping can be formed by adding viscous damping oil between the outer wall of the plug connecting rod 222 and the inner wall of the connecting pipe part 31, or by setting a unidirectional force-bearing rubber ring.

[0030] The discharge port 11 of the sample container 1 is connected to a drain pipe 4, and the liquid in the sample container 1 is discharged to the outside through the drain pipe 4, in this case, to the sewage pipe of the municipal pipe network. The drain pipe 4 is provided with a check valve 5 to prevent the liquid at the downstream end of the check valve 5 from flowing back.

[0031] See also Figures 3 to 5 As shown, it also includes a water drawer 6, which is used for the sampler to draw liquid from the sample container 1. The water drawer 6 in this example is a press-type water drawer, and the water drawer 6 is movably arranged, so the sampler only extends it into the sample container 1 when it is necessary to draw liquid.

[0032] The sampled pipeline G is also provided with a flow regulating valve 7 for regulating the liquid inlet flow rate of the sample container 1. According to the preset volume of the sample container 1, the liquid inlet flow rate can be changed to obtain the sampling period, which is also the period for the sample container 1 to automatically discharge liquid when no one is taking water. The period setting is determined according to the actual situation, such as 6 hours, 8 hours, 12 hours, 24 hours, etc. The flow regulating valve 7 in this example is a rotary manual regulating valve.

[0033] The sampled pipe G is a sewage pipe in the factory area, and the liquid is wastewater in the factory area. The sample retention device is set outside the factory area, specifically underground, and a lockable sample retention cover 8 is provided on the sample retention container 1 to prevent other unrelated personnel other than the sampling personnel from opening the sample retention device without authorization and affecting the objectivity and accuracy of the sample retention. If necessary, a sampler box or a sampling room can be set up to enclose the flow control valve 7 and the sample retention cover 8 for protection.

[0034] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A liquid automatic sample retention device, characterized in that: It includes a sample container, which is connected to a sampled pipeline for collecting liquid in the sampled pipeline. A valve mechanism is provided in the sample container, and the valve mechanism includes a float assembly and a plug assembly. The plug assembly is arranged on a fixed rod and forms a damping connection with the fixed rod. The valve mechanism is configured to enable the plug assembly to open a discharge port of the sample container under the joint action of the float assembly and the liquid in the sample container. The valve mechanism is also configured to close the discharge port of the sample container under the action of damping after the liquid level in the sample container drops.

2. The liquid automatic sample retention device according to claim 1, characterized in that: The float assembly includes a float and a float rotating rod, the float is provided at one end of the float rotating rod, the middle part of the float rotating rod is rotatably connected to the first fulcrum, and the other end of the float rotating rod is connected to the plug assembly, the plug assembly includes a plug rotating rod, a plug connecting rod and a plug, the middle part of the plug rotating rod is rotatably connected to the second fulcrum, one end of the plug rotating rod is connected to the float rotating rod, and the other end of the plug rotating rod is connected to the plug through the plug connecting rod.

3. The automatic liquid sample retention device according to claim 2, characterized in that: The first fulcrum is arranged at a position lower than the second fulcrum, and the end of the plug rotating rod and the end of the float rotating rod are connected by means of an elastic connecting piece.

4. The liquid automatic sample retention device according to claim 2, characterized in that: The lower end of the fixing rod is fixedly connected to the bottom of the sample container. The fixing rod is provided with a connecting pipe portion located on one side of the fixing rod in the radial direction. The plugging connecting rod is sleeved in the connecting pipe portion, and the outer wall of the plugging connecting rod forms a damping connection with the inner wall of the connecting pipe portion.

5. The automatic liquid sample retention device according to claim 1, characterized in that: The discharge port of the sample retaining container is connected to a discharge pipe, and the liquid in the sample retaining container is discharged to the outside through the discharge pipe. The discharge pipe is provided with a check valve.

6. The liquid automatic sample retention device according to claim 1, characterized in that: It also includes a water drawer, which is used for sampling personnel to draw liquid from the sample container.

7. The liquid automatic sample retention device according to claim 1, characterized in that: The sampled pipeline is also provided with a flow regulating valve for regulating the liquid inlet flow of the sample retaining container.

8. The liquid automatic sample retention device according to claim 1, characterized in that: The sampled pipeline is a factory sewage pipe, and the liquid is factory wastewater.

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